#pragma warning(disable:4996)
#include<stdio.h>
int main()
{     //大小写转化
        int ch = 0;
        while ((ch = getchar()) != EOF)
        {
               if (ch >= 'a' && ch <= 'z')
               {
                       ch -= 32;//('a'-''A);
                       putchar(ch);
               }
        }
        //EOF   即ctrl+z，ascll对应的十进制是-1
               return 0;
}
